ericsson k700i or nokia 6230?

im interested in upgrading my mobile phone. im currently looking at both the nokia 6230 and sony ericsson k700i. has anyone had any experience with either of these, comments would be most appreciated. what res images does the k700i take, the webby states that it is a vga camera but does not say the res. i know that the nokia captures 640x480 images, is this the same with the k700i? both are have vga cameras.
is it possible to buy new covers for the ericsson?